Wayne Whitney wrote:
Hello,

I'd like to control a porch light with both a switch and a motion
detector. Switch on, light on; switch off, light on motion detector.
I've come up with two ways to wire this using a 3 Way Switch (DPST,
right?). Here are diagrams of the hot side:

Incoming ------------- 3 Way Switch ------------ Light
Power | A | B Common
| |
---- Motion ----
Detector

Incoming ------------ 3 Way Switch ---------- Light
Power Common | A B |
| |
---- Motion ----
Detector

The second way would be easier to wire (less box fill at the switch),
but I think it wouldn't work, as it presents the Motion Detector with
120V at its output when the switch is in position B. I'm assuming the
Motion Detector will require a neutral and will be quite unhappy to
have 120V at its output. Is this correct?

Is everything OK with the first diagram?

Thanks, Wayne

Check out some of the current like of fixtures and motion detectors. I
believe you will be able to find what you want without changing any wiring.
I believe you can find one that switch off light off, switch on light on,
switch on again light controlled by motion detector.

--
Joseph Meehan

26 + 6 = 1 It's Irish Math